Question

For the functioning of a transistor its emitter-base junction has to be:

Answer 1

A transistor is a semiconductor device that can conduct as well as insulate electrical current or voltage. A transistor is a switch and an amplifier in one. A transistor, in simple terms, is a small device that is used to control or regulate the flow of electronic signals.

Complete step by step solution:
Transistors are one of the most important components in most modern electronic devices. The transistor, invented in 1947 by three American physicists John Bardeen, Walter Brattain, and William Shockley, is regarded as one of the most important inventions in science history.
A typical transistor is made up of three layers of semiconductor materials, or more precisely, terminals, which help to connect the transistor to an external circuit and carry current. The current through the other pair of terminals of a transistor is controlled by the voltage or current applied to any pair of terminals of the transistor. For a transistor, there are three terminals. They're as follows:
Base: The base of the transistor is used to turn it on.
Collector: The transistor's positive lead is known as the collector.
Emitter: The transistor's emitter is the negative lead.
Forward biasing is when a voltage is applied to a diode that allows current to flow freely, whereas reverse biasing is when a voltage is applied in the opposite direction to a diode. With reverse biasing, the voltage does not cause any significant current to flow.
Thus, A transistor's emitter-base junction must be forward biased for it to function.

Note:
Benefits of a Transistor
The price is lower, and the size is smaller.
Mechanical sensitivity is reduced.
The operating voltage is low.
Life expectancy is extremely high.
There is no need for electricity.
Switching is done quickly.
Circuits with higher efficiency can be developed.
A single integrated circuit was developed using this method.